padchannel.java

pos机交易实现源代码 含金融卡交易8583协议实现 开发环境：linux 典型应用：嵌入系统开发 仅供参考

/*
 * Copyright (c) 2000 jPOS.org.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *    "This product includes software developed by the jPOS project 
 *    (http://www.jpos.org/)". Alternately, this acknowledgment may 
 *    appear in the software itself, if and wherever such third-party 
 *    acknowledgments normally appear.
 *
 * 4. The names "jPOS" and "jPOS.org" must not be used to endorse 
 *    or promote products derived from this software without prior 
 *    written permission. For written permission, please contact 
 *    [e-mail].
 *
 * 5. Products derived from this software may not be called "jPOS",
 *    nor may "jPOS" appear in their name, without prior written
 *    permission of the jPOS project.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  
 * IN NO EVENT SHALL THE JPOS PROJECT OR ITS CONTRIBUTORS BE LIABLE FOR 
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the jPOS Project.  For more
 * information please see <http://www.jpos.org/>.
 */

package org.jpos.iso.channel;

import java.io.*;
import java.util.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import org.jpos.util.Logger;
import org.jpos.util.LogEvent;
import org.jpos.iso.*;
import org.jpos.iso.packager.XMLPackager;

/**
 * Implements an ISOChannel suitable to be used to connect to an X.25 PAD. 
 *
 * @author  <a href="mailto:[e-mail]">Alejandro P. Revilla</a>
 * @version $Id: PADChannel.java,v 1.7 2002/08/06 14:26:31 apr Exp $
 *
 * @see ISOMsg
 * @see ISOException
 * @see ISOChannel
 */
public class PADChannel extends BaseChannel {
    BufferedReader reader = null;
    /**
     * No-args constructor
     */
    public PADChannel () {
        super();
    }
    /**
     * Constructs client ISOChannel
     * @param host  server TCP Address
     * @param port  server port number
     * @param p     an ISOPackager
     * @see ISOPackager
     */
    public PADChannel (String host, int port, ISOPackager p) {
        super(host, port, p);
    }
    /**
     * Construct server ISOChannel
     * @param p     an ISOPackager
     * @see ISOPackager
     * @exception IOException
     */
    public PADChannel (ISOPackager p) throws IOException {
        super(p);
    }
    /**
     * constructs a server ISOChannel associated with a Server Socket
     * @param p     an ISOPackager
     * @param serverSocket where to accept a connection
     * @exception IOException
     * @see ISOPackager
     */
    public PADChannel (ISOPackager p, ServerSocket serverSocket) 
        throws IOException
    {
        super (p, serverSocket);
    }
    public ISOMsg receive() throws IOException, ISOException {
        byte[] header = null;
        ISOMsg m = new ISOMsg ();
        m.setPackager (packager);
        int hLen = getHeaderLength();
	LogEvent evt = new LogEvent (this, "receive");
	try {
            synchronized (serverIn) {
                if (hLen > 0) {
                    header = new byte [hLen];
                    serverIn.readFully(header);
                }
                m.unpack (serverIn);
            }
            m.setHeader (header);
            m.setDirection(ISOMsg.INCOMING);
            m = applyIncomingFilters (m, evt);
            m.setDirection(ISOMsg.INCOMING);
            evt.addMessage (m);
            cnt[RX]++;
            setChanged();
            notifyObservers(m);
	} catch (ISOException e) {
	    evt.addMessage (e);
	    throw e;
	} catch (EOFException e) {
	    evt.addMessage ("<peer-disconnect/>");
	    throw e;
	} catch (InterruptedIOException e) {
	    evt.addMessage ("<io-timeout/>");
	    throw e;
	} catch (IOException e) { 
	    if (usable) 
		evt.addMessage (e);
	    throw e;
	} catch (Exception e) { 
            evt.addMessage (e);
	    throw new ISOException ("unexpected exception", e);
	} finally {
	    Logger.log (evt);
	}
        Logger.log (evt);
        return m;
    }

    /**
     * @param header Hex representation of header
     */
    public void setHeader (String header) {
	super.setHeader (
	    ISOUtil.hex2byte (header.getBytes(), 0, header.length() / 2)
	);
    }
}